CVE-2011-4022
The sensor in Cisco Intrusion Prevention System (IPS) 7.0 and 7.1 allows remote attackers to cause a denial of service (file-handle exhaustion and mainApp hang) by making authentication attempts that exceed the configured limit, aka Bug ID CSCto51204.
Date published : 2012-05-03
http://www.cisco.com/web/software/282549709/56954/IPS-7-1-3-E4_readme.txt